I have copied the library code into the sketch folder to make it easier to modify. Run the sketch and report what happens. It will not work with the libraries in place. Before you load the arduino-0015 gui and this sketch, DELETE OR MOVE THE FOLLOWING DIRECTORIES AND THEIR CONTENTS:

Can you tell us what you have done so far to find out why this is happening? That would help a lot. If you can say that the board is connected and the IDE can communicate then that narrows things down. Can you upload other sketches? Is there smoke coming from anything?

Did you change the text in the sketch to try and induce an error?Did you do anything other than click the play button?Try setting the compiler to verbose output. The information is available on the main site on how to do this.

Good news!!!!DevicePrint is not impossible to make work!!Well at least with the arduino fourm.

This is what I got:uFat / DevicePrint Demo2009 arduinonut.blogspot.com

All initialised OK!Writing...Done!

And poof.

I did three things, first, in libraries I changed wconstants to WConstants as well as wprogram to WProgram. Second, I built sirmorris's circuit instead of some other thing. Third made sure there was a file on my SD card named data.txt and some data on it(I put 11mb of "B") on it. Thats it!!

I am going to make a barcode datalogger. I need some help modifying the code.

The code link is at the bottom of the page:http://www.arduino.cc/playground/ComponentLib/BarcodeScanner

If you are going to help me:Please make the format like this:72892384578732587487238585945234532452364674672452365775678624525645756756865345734733567

You get the point, I want every scan to be on its own line like up there. And I want every error that might come up to flash an led continuously on digital pin 8. I want the same led to be lit whenever it can accept another scan(so the led turns off for about 500 ms and turn on again when it can accept another scan).

You may get a better response if you focus on a specific problem that is standing in your way. Perhaps explain your ideas for how you want to interface the datalogger to the existing code and say how much you have done?